孩子们在操场上玩追逐游戏时兴奋地尖叫着。

The kids were ___squealing with excitement while playing chase on the playground.

当老师宣布要突击测验时，学生们立刻尖叫起来。

The students started ___squealing when the teacher announced a pop quiz.

他威胁说要向老师告发我们作弊。

He threatened to ___squeal on us for cheating to the teacher.